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Prediction of inflow from overlying aquifers into coalmines: a case study in Jinggezhuang Coalmine, Kailuan, China

ENVIRONMENTAL GEOLOGY 2008年第4期55卷 775-780页

作者： Wu, Qiang Zhou, Wanfang China Univ Min & Technol Resources Dev Engn Dept Beijing 100083 Peoples R China PE LaMoreaux & Associates Inc Oak Ridge TN 37830 USA

Aquifers overlying coal seams are common water sources in coalmines. The unexpected inflow of water can flood mines and threatens the mine safety. Mine flooding caused by the overlying aquifers has occurred more frequently in recent years in China. Proposed in this paper is a new method that involves three basic maps and two predictions to tackle this geo-hazard. This new approach is based on the water abundance in the overlying aquifer and risk analysis of the roof collapse. It couples groundwater flow models with rock mechanics analysis. The method was successfully applied to prediction of the water intrusion from the overlying aquifer at Jinggezhuang Coalmine in Kailuan, China. The areas with high risk of water intrusion were delineated. visual modflow (version 2.61) was used to simulate the inflows at two active working faces. The developed approach can predict the total inflow for a working face and the transient inflow as the working face advances.

关键词： overlying aquifers roof collapse water intrusion visual modflow coalmine China

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Study on the Contribution of Groundwater Nitrogen Pollution Sources in a Typical Section of the Wei River in China

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WATER 2024年第5期16卷 699页

作者： Li, Yuepeng Liu, Zhixiong Qu, Jihong Xiao, Shunyu Wu, Jiamei North China Univ Water Resources & Elect Power Coll Geosci & Engn Zhengzhou 450046 Peoples R China

Aiming to assess the groundwater nitrogen pollution problem in a typical section of the Wei River in China, the contribution of groundwater nitrogen pollution sources in the region was studied. Using Hydrus-1D to implement the simulation process of substituting points for surfaces, we calculated the volume and nitrogen concentration of the water leaching out from the bottom of the encompassing aeration zone. The results of the Hydrus-1D simulation were input as initial values into the nitrogen migration and transformation numerical model constructed using visual modflow to integrate the simulation calculations between the surface, the aeration zone, and the aquifer system. In addition, the contribution rates of different groundwater nitrogen pollution sources were calculated using the equilibrium formula combined with the groundwater nitrogen test results. The simulation results showed that the groundwater nitrogen in the southern part of the Wei River comes from two main sources: vertical infiltration and river recharge. Specifically, ammonia nitrogen vertical infiltration and river recharge contribute 95.82% and 4.18%, respectively;nitrite nitrogen vertical infiltration and river recharge contribute 92.41% and 7.59%;and nitrate nitrogen vertical infiltration and river recharge contribute 94.26% and 5.74%. According to the simulation results, an increase in the intensity of surface water pollution control is required in the study area. It is also necessary to control the use of nitrogen fertiliser on farmland in the study area and improve the utilisation rate of nitrogen fertiliser to reduce the nitrogen pollution loads from these sources.

关键词： groundwater nitrogen pollution Hydrus-1D visual modflow contribution rate

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Simulation on forecast and control for groundwater contamination of hazardous waste landfill

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ENVIRONMENTAL EARTH SCIENCES 2014年第10期72卷 4097-4104页

作者： Zhou, Yun Jiang, Yonghai An, Da Ma, Zhifei Xi, Beidou Yang, Yu Li, Mingxiao Hao, Fanghua Lian, Xinying Chinese Res Inst Environm Sci State Key Lab Environm Criteria & Risk Assessment Beijing 100012 Peoples R China Beijing Normal Univ Sch Environm Beijing 100875 Peoples R China

The groundwater flow and solute transport models were established by visual modflow, which was used to forecast the transport process of Cr6+ in groundwater and simulate the effects of three control measures of contaminants transport after percolation solution leakage happened in the impermeable layer of the landfill. The results showed that the contamination plume of Cr6+ would reach the pool's boundary in 10 years, and the distance of contamination transport was 1,450 m. However, the contamination plume will not be obviously expanded between 10 and 20 years. While the ground was covered by hardened concrete, the contamination plume would not reach the pool's boundary in 20 years. When the leakage-proof barrier was set in the bottom of an unconfined aquifer, the concentration of Cr6+ was higher than that of the leakage-proof barrier unset, but the result was opposite when setting the leakage-proof barrier in the bottom of confined aquifer. The range of the contamination plume was effectively controlled by setting drainage ditches in which water discharge was 2,298.05 m(3) d(-1), which produced monitoring wells which are not contaminated in 20 years. In sum, combining ground hardening with drainage ditches could produce the best effect in controlling contaminants diffusion, and meanwhile, the drainage ditches daily discharge was reduced to 1,710.19 m 3 d(-1).

关键词： visual modflow Landfill Groundwater Transport simulation Forecast Contamination control

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Characterizing and predicting contaminant transport in the Newport Wellfield aquifer, Ohio

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GEOSCIENCES JOURNAL 2013年第4期17卷 465-477页

作者： Antonacci, Thomas Lee, Eung Seok Kim, Yongje Ohio Univ Dept Geol Sci Athens OH 45701 USA Korea Inst Geosci & Mineral Resources Geol Environm Div Taejon 305350 South Korea

The aquifer that supplies the Newport Wellfield in Ohio has been contaminated with trichloroethylene (TCE), cisdichloroethylene (DCE), and vinyl chloride (VC). These contaminants were introduced into the aquifer during the 1960s and 1970s when local industries donated their waste products to the local volunteer fire department that used the chemicals in training exercises. Past remediation efforts included a pump and treat scheme but the contamination persists. This study characterized the groundwater flow and the transport of TCE, DCE, and VC in the aquifer through analyses of site-specific geologic, hydrogeologic, pump test, and contaminant concentration data using AQTESOLV, Hydro GeoBuilder, and visual modflow. Based on our model results, the uncontaminated production wells (PW-1 and PW-3) will not become contaminated in the future. However, under the current pumping scheme, the aquifer will not meet the maximum contaminant level allowed by the US EPA (5 mg/L) for 6.5 years. This time could be reduced to less than 3 years if the pumping rate of the contaminated well (PW-2) is increased to 140 gallons per minute and it is pumped continuously.

关键词： AQTESOLV contaminant fate and transport dichloroethylene Hydro GeoBuilder remediation trichloroethylene vinyl chloride visual modflow

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Quantifying the overlooked groundwater component in the water budget of a shallow soda lake in Hungary amidst climate change concerns

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JOURNAL OF HYDROLOGY-REGIONAL STUDIES 2024年 56卷

作者： Bajak, Petra Csepregi, Andras Szabo, Peter Chappon, Mate Toth, Adam Hegedus-Csondor, Katalin Eross, Anita Eotvos Lorand Univ Inst Geog & Earth Sci Jozsef & Erzsebet Toth Endowed Hydrogeol Chair & F Pazmany Peter setany 1-C H-1117 Budapest Hungary Hydrosys Ltd Mester utca 34 H-1095 Budapest Hungary Eotvos Lorand Univ Inst Geog & Earth Sci Dept Meteorol Pazmany Peter setany 1-A H-1117 Budapest Hungary Szechenyi Istvan Univ Natl Lab Water Sci & Water Secur Dept Transport Infrastruct & Water Resources Engn Egyetem ter 1 H-9026 Gyor Hungary Univ Utrecht Copernicus Inst Sustainable Dev Vening Meineszgebouw A Princetonlaan 8a NL-3584 CB Utrecht Netherlands

Study region: Lake Velence. Study focus: Soda lakes are extreme habitats whose special hydrochemical characteristics can partly be explained by groundwater inflow. The relationship between groundwater and Lake Velence has never been properly investigated. A significant decrease in the lake's level in recent years urged an evaluation of the components of the lake's water budget, including groundwater as well. A 3D transient numerical groundwater flow simulation, using visual modflow, was performed between 1990 and 2021 to evaluate the lake's relationship with groundwater and quantify the groundwater discharge into the lake. To assess future lake level changes until 2050, six lake level simulations were run based on three different regional climate models and two global warming scenarios (RCP2.6 and RCP8.5). New hydrological insights for the region: Our results showed that groundwater inflow accounts for up to 12 % of the total annual inflow into Lake Velence. It has been numerically shown that precipitation and evaporation are the primary drivers of lake level changes, meaning that the variation of these two parameters will impact the lake's future. As for the future lake level changes, the RCP2.6 scenario resulted in an increase of 11 cm, while the RCP8.5 scenario led to a decrease of 30 cm compared to the observed annual average lake level until 2050. Our results emphasize the importance of integrating soda lakes into topography-driven groundwater flow systems to develop climate change adaptation strategies.

关键词： Surface water-groundwater interaction Lake level projection Topography-driven groundwater flow systems visual modflow Regional climate models

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The influence of riverbank filtration on regional water resources: a case study in the Second Songhua River catchment, China

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WATER SUPPLY 2020年第4期20卷 1425-1438页

作者： Ye, Xueyan Cui, Ruijuan Wang, Lixue Du, Xinqiang Jilin Univ Key Lab Groundwater Resources & Environm Minist Educ Changchun 130021 Peoples R China Jilin Univ Jilin Prov Key Lab Water Resources & Environm Changchun 130021 Peoples R China Jilin Univ Coll New Energy & Environm Changchun 130021 Peoples R China Jinan Inst Environm Res Jinan 250102 Peoples R China

Riverbank filtration (RBF) of river water recharging a groundwater system has been identified as a source of water supply that guarantees the quantity of abstracted water and reduces the cost of water treatment. This paper evaluates the safe yield of groundwater in suitable areas using a numerical model of groundwater flow and discusses the influence of RBF on the temporal variation of regional hydraulic heads, groundwater flow, river flow, and groundwater-surface water interaction (GSI) under different precipitation frequencies from 20% to 95% along the Second Songhua River in Northeast China. This study shows that the potential of RBF is enormous and that the total safe yield of groundwater abstraction was 29.56 x 10(4) m(3)/day under the precipitation frequency of 95%. The direction of regional groundwater flow was not obviously changed except within the local groundwater flow field under the maximum safe yield pumping conditions. When the precipitation frequencies are higher than 75%, the direction of the GSI might be changed, and the rate of river recharge of groundwater is enhanced. The water quantity that would be captured from the river does not threaten the safety of the river ecology. It is concluded that there were no obvious adverse impacts of the large scale of RBF on regional water resources in the Second Songhua River area.

关键词： groundwater resources assessment groundwater safe yield groundwater-surface water interaction precipitation frequencies river bank filtration visual modflow

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基于modflow的地下水资源评价——以新疆乌恰县阿克莫木气田水源地为例

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灌溉排水学报 2016年第S2期 41-45页

作者：郑紫文乔晓英苏明磊郭以威长安大学环境科学与工程学院干旱区地下水文与生态效应教育部重点实验室陕西省矿产资源勘查与综合利用重点实验室新疆地质工程勘察院

为了合理开发利用和有效保护区域地下水资源,根据乌恰水源地的水文地质条件,运用地下水数值模拟软件visual modflow,建立了地下水三维非稳定流模型,并采用3种不同开采方案进行20 a预测。同时应用Drain模块,对研究区泉流量计算值与实测... 详细信息

为了合理开发利用和有效保护区域地下水资源,根据乌恰水源地的水文地质条件,运用地下水数值模拟软件visual modflow,建立了地下水三维非稳定流模型,并采用3种不同开采方案进行20 a预测。同时应用Drain模块,对研究区泉流量计算值与实测值进行校验,增加了模型的可靠度。结果表明,所建立的数学模型能够较真实反映区域水文地质条件,模拟结果与实际情况较吻合。综合分析地下水水位变化、地下水量构成等,方案Ⅲ地下水开采引起的地下水位波动适中,地下水量构成变化较小;在整个地下水开采过程中,开采量有可靠地补给保证。

关键词：地下水资源数值模拟 visual modflow 水源地

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Evaluation of Water Inrush Vulnerability from Aquifers Overlying Coal Seams in the Menkeqing Coal Mine, China

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MINE WATER AND THE ENVIRONMENT 2015年第3期34卷 258-269页

作者： Wu, Qiang Liu, Yuanzhang Zhou, Wanfang Li, Baoyu Zhao, Bin Liu, Shouqiang Sun, Wenjie Zeng, Yifan China Univ Min & Technol Beijing 100083 Peoples R China Beijing Inst Hydrogeol & Engn Geol Beijing 100195 Peoples R China ERT Inc Knoxville TN 37934 USA

The vulnerability of the C2-1 and C3-1 coal seams to water inrush from overlying aquifers was evaluated for a portion of the Menkeqing coal mine. Geological and hydrogeological data were used to develop a conceptual model. Using the 'three maps-two predictions' method, an index model of water abundance (yield) of the overlying aquifers was constructed and overlain on a map that indicates potential fractured zone connections to the overlying aquifers. Superposition of the two zoning maps allowed development of a comprehensive inrush vulnerability map. Mine discharges were predicted under both natural and mining conditions using visual modflow, and appropriate prevention and control measures are proposed.

关键词： Three maps-two predictions method Geographic information system Analytic hierarchy process visual modflow

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Comparative analysis of different boundary conditions and their influence on numerical hydrogeological modeling of Palmital watershed, southeast Brazil

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JOURNAL OF HYDROLOGY-REGIONAL STUDIES 2017年 12卷 210-219页

作者： Coelho, Clivia D. Faria, Agnes Caroline S. Marques, Eduardo Antonio G. Univ Fed Vicosa Agr Engn Dept Vicosa MG Brazil Univ Fed Vicosa Civil Engn Dept Campus Univ BR-36570000 Vicosa MG Brazil

Study region: The study is based on field data of a shallow phreatic aquifer occurring at a small watershed in Vicosa, Minas Gerais, Brazil. Study focus: The present study aims to evaluate numerical hydrological models generated using different boundary conditions as field data did not allowed a proper definition of the most adequate boundary condition to simulate the field characteristics observed within the study area. Data field was used to build a conceptual model and to determine initial and some of the boundary conditions of model mesh. Three numerical hydrogeological models were generated on visual modflow (R). Once created, the models were calibrated using the WinPEST (R). GHB, River and Stream boundary conditions resulted on a calibrated standard Root Mean Square (RMS) varying from 7.3% to 13.02% and showed high correlation coefficients, varying from 94% to 97%. Using another set of hydraulic head field data, these models were later validated. New hydrological insights for the region: Results show that, for all three boundary conditions, the normalized RMS obtained in calibration was similar to that obtained in validation, confirming its validity. The Rivers boundary condition have presented the most representative values for normalized RMS, absolute average error and correlation coefficient, and are the most indicated boundary conditions for areas with similar physical characteristics to the area under study.

关键词： Phreatic aquifers visual modflow Internal boundary conditions Rural areas

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Groundwater resources management through flow modeling in lower part of Bhagirathi - Jalangi interfluve, Nadia, West Bengal

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JOURNAL OF THE GEOLOGICAL SOCIETY OF INDIA 2011年第6期78卷 587-598页

作者： Kumar, Sudhir Halder, Subrata Singhal, D. C. Natl Inst Hydrol Roorkee 247667 Uttarakhand India State Water Invest & Dev Dept Kolkata 700091 India Indian Inst Technol Dept Hydrol Roorkee 247667 Uttarakhand India

Groundwater utilization in Nadia district, West Bengal has been subjected to rapid exploitation in the wake of increasing urbanization and production of agricultural commodities. It is, therefore, necessary to evaluate the existing trend and availability of groundwater in time and space and its movement for proper planning in future. In the present study, an attempt has been made develop a groundwater management model using visual modflow software. The groundwater flow model for the study area was formulated by using input hydrogeological data and appropriate boundary conditions. The groundwater flow pattern of the study area indicates the occurrence of base flow which feed both the Rivers Bhagirathi and Jalangi throughout the year. The computed hydraulic heads were calibrated by comparing with observed groundwater level data for years 2004 to 2006 and were verified with the data of 2007. The outcome of modeling shows that this model can be used for prediction purpose in the future by updating input boundary conditions and hydrologic stresses during the preceding year. The model optimized unit draft for deep tube well as 556.5 m(3)/day and the same for shallow tube well as 41 m(3)/day keeping the existing tube well structures in running condition and maintaining the present and recent past trends of groundwater level. The model can be further improved if more spatial and temporal input parameters are available and can be incorporated into the model for more realistic characterization of groundwater flow.

关键词： Groundwater modeling Base flow visual modflow Bhagirathi Jalangi Interfluve Nadia West Bengal

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